Unique file id not really unique

Hi

I'm facing a problem regarding "unique" file id. I got 2 completely different files that have exactly the same id. What is the purpose of this "unique" id if it is not unique.

I have a business account.

In v2 API communication webpage available here it is clearly written:

Why files API returns only one result while there are 2 files identified with specified id... I am skeptical about the reliability of the result of certain requests (see below)

I'm really confused because all my custom developments are based on this unique id.

This is what get_metadata request returns for the 2 files (I have plenty of examples):

{
".tag": "file",
"name": "5-ENTRAINEMENT IOB NIVEAU 1 non corrigé.pdf",
"path_lower": "/dossier de l'équipe groupe valoriale/3-manuels de formations/1-iob 1/formation iobsp v1/travail a rendre/5-entrainement iob niveau 1 non corrigé.pdf",
"path_display": "/Dossier de l'équipe GROUPE VALORIALE/3-manuels de formations/1-iob 1/FORMATION IOBSP V1/TRAVAIL A RENDRE/5-ENTRAINEMENT IOB NIVEAU 1 non corrigé.pdf",
"parent_shared_folder_id": "1353864676",
"id": "id:T6nGbXWJXnAAAAAAAAAATQ",
"client_modified": "2017-08-03T14:26:18Z",
"server_modified": "2017-12-18T15:32:50Z",
"rev": "20750b255e4",
"size": 2405480,
"sharing_info": {
"read_only": false,
"parent_shared_folder_id": "1353864676",
"modified_by": "dbid:AAA4Kn1daNJ6mXAl7ZnQceSadiYvkdo91sI"
},
"content_hash": "7d885b6fdeefe7b8b7c8f7666ff5a449b5ea77e95db8bbb1951ed89d12303df3"
}

{
".tag": "file",
"name": "16-LCB.mp4",
"path_lower": "/dossier de l'équipe groupe valoriale/3-manuels de formations/1-iob 1/formation iobsp v1/acces manuel et complements/complements a lire/16-lcb.mp4",
"path_display": "/Dossier de l'équipe GROUPE VALORIALE/3-manuels de formations/1-iob 1/FORMATION IOBSP V1/acces manuel et complements/COMPLEMENTS A LIRE/16-LCB.mp4",
"parent_shared_folder_id": "1353864676",
"id": "id:T6nGbXWJXnAAAAAAAAAAtQ",
"client_modified": "2016-06-16T15:36:02Z",
"server_modified": "2018-03-01T09:09:39Z",
"rev": "25550b255e4",
"size": 173195596,
"sharing_info": {
"read_only": false,
"parent_shared_folder_id": "1353864676",
"modified_by": "dbid:AAA4Kn1daNJ6mXAl7ZnQceSadiYvkdo91sI"
},
"content_hash": "78e8cd0abd449d162ced4c80027967a92ad0152156437396667f189a6575b59d"
}